登陆界面：newinput.jsp
我点这个图片验证码也不会更新！！
<html>
<head>
<title>验证码</title>
<script type="text/javascript">
$(function(){
//给验证码的图片，绑定单击事件
$("#code_img").click(function(){
alert(this.src);
//this.src = "${basePath}/kaptcha.jpg?d=" + new Date();
});
});
</script>
</head>
<body >
<FORM action="http://localhost:8080/tmp_war_exploded/newInputServlet" method=get name=form>
<P>请输入下列信息：<br/>
学号:<input type="text" name="ID" value="123456"><br/>
姓名:<input type="text" name="username" value="liu"><br/>
专业:<input type="radio" name="major" value="计算机"/>计算机
<input type="radio" name="major" value="软件工程"/>软件工程
<input type="radio" name="major" value="网络工程"/>网络工程<br/>
验证码:<input type="text" style= "width: 60px;" name= "code">
<img id="code_img" src="kaptcha.jpg" alt="" style= "width: 100px; height: 28px;"><br/>
<input type="submit" value="登录" name="logIn">
</FORM>
</body>
</html>
验证码servlet：
public class NewInputServlet extends HttpServlet{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//获取Session中的验证码
String token = (String) req.getSession().getAttribute(KAPTCHA_SESSION_KEY);
//删除Session验证码
req.getSession().removeAttribute(KAPTCHA_SESSION_KEY);
String code = req.getParameter("code");
//获取用户名
//String username = req.getParameter("username");
if (token != null && token.equalsIgnoreCase(code)) {
//System.out.println("该生的姓名为："+username);
resp.sendRedirect(req.getContextPath()+"/ok.jsp");
}else{
resp.sendRedirect(req.getContextPath()+"/fault.jsp");
}
}
}
登录成功后显示：
<body >
<a href="http://localhost:8080/tmp_war_exploded/newinput.jsp">返回登录界面</a> <% request.setCharacterEncoding("utf-8");
String yourID=request.getParameter("ID");
String yourName=request.getParameter("username");
String yourMajor=request.getParameter("major");
out.println("<P> 您的姓名:"+yourName+"</P>");
out.println("<P> 您的学号:"+yourID+"</P>");
out.println("<P> 您的专业:"+yourMajor+"</P>");
%>
</body>
